Common rail
AssigneeDenso Corporation
InventorsTomoaki Nagasaka, Hiroyuki Yokoya
Life of this patent
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AssigneeDenso Corporation
InventorsTomoaki Nagasaka, Hiroyuki Yokoya
Estimating the term…
A small-diameter circular column portion having a diameter slightly smaller than that of a small-diameter hole (press-fitting hole) of an inside-outside communication hole is formed at a press-fitting end portion of a bush. A narrow annular clearance is formed between the small-diameter circular column portion and the small-diameter hole when the bush is press-fitted. Even if a press-fitting burr is produced at the press-fitting end portion during manufacturing of a common rail, the press-fitting burr is confined in the depth of the annular clearance. Even when fuel flows through the inside-outside communication hole during engine operation, movement of the fuel and the fuel flow acting on the press-fitting burr are limited in the depth of the annular clearance, inhibiting the press-fitting burr from dropping out or flowing out. Thus, a highly reliable common rail can be provided at low cost.
A common rail comprising:
A common rail comprising:
A manufacturing method of a common rail having an accumulation chamber that accumulates high-pressure fuel therein, an inside-outside communication hole that connects the accumulation chamber with an outside, and a bush that is fixed in the inside-outside communication hole and that has an orifice for narrowing a fuel passage of the inside-outside communication hole, the manufacturing method comprising:
Dependencies are inferred from the claim text.